Scieneer Common Lisp 1.3.9 online documentation

ext:stream-out-tail object[Function]

Accessor for the tail index into the stream output buffer. While the tail is less than the output buffer length, elements may be written directly to the output buffer increasing the tail index. When the buffer is full, the buffer output method ext:stream-write-chars or ext:stream-write-bytes will be called. If the output buffer length is zero then the unbuffered stream ext:stream-write-byte or ext:stream-write-char method will be call to output an element.

(setf (ext:stream-out-tail object) new-value)[Function]